我正在制作一个WhatsApp机器人，我将聊天记录保存在Excel文件中（我使用Exceljs）来读取和处理一些响应，我更喜欢使用Promise并解决它们，我有一个读取聊天记录的函数：

const readChat = (number, message, step = null) =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      number = number.replace("@c.us", "");
      number = `${number}@c.us`;
      const pathExcel = `./chats/${number}.xlsx`;
      const workbook = new ExcelJS.Workbook();
      const today = moment().format("DD-MM-YYYY hh:mm");

      if (fs.existsSync(pathExcel)) {
        const workbook = new ExcelJS.Workbook();
        workbook.xlsx
          .readFile(pathExcel)
          .then(() => {
            const worksheet = workbook.getWorksheet(1);
            const lastRow = worksheet.lastRow;
            let getRowInsert = worksheet.getRow(++lastRow.number);
            getRowInsert.getCell("A").value = today;
            getRowInsert.getCell("B").value = message;

            if (step) {
              getRowInsert.getCell("C").value = step;
            }

            getRowInsert.commit();
            workbook.xlsx
              .writeFile(pathExcel)
              .then(() => {
                const getRowPrevStep = worksheet.getRow(lastRow.number);
                const lastStep = getRowPrevStep.getCell("C").value;
                resolve(lastStep);
              })
              .catch((err) => {
                console.log("ERR", err);
                reject("error");
              });
          })
          .catch((err) => {
            console.log("ERR", err);
            reject("error");
          });
      } else {
        const worksheet = workbook.addWorksheet("Chats");
        worksheet.columns = [
          { header: "Fecha", key: "number_customer" },
          { header: "Mensajes", key: "message" },
          { header: "Paso", key: "step" },
        ];

        step = step || "";

        worksheet.addRow([today, message, step]);
        workbook.xlsx
          .writeFile(pathExcel)
          .then(() => {
            resolve("STEP_1");
          })
          .catch((err) => {
            console.log("Error", err);
            reject("error");
          });
      }
    }, 1000);
  });

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但是在那之后的代码，它给了我错误：ERR错误：到达数据结尾（数据长度= 0，请求索引= 4）。拉链坏了？，else，应该在该聊天没有保存excel时执行。我搜索了很多问题和网页，但我没有找到任何解决方案